1. To enter the instrument cluster self-diagnostic mode simultaneously depress and hold the tripmeter reset button then turn the ignition switch to position II or III.
2. Release the tripmeter reset button when TEST is displayed on the LCD. This will take between 5 and 8 seconds.
3. The instrument cluster will enter the gauge sweep test.
4. To navigate to the following tests while in self-diagnostic mode depress the RESET button to move to the next test.
5. The self-test is deactivated when the ignition is turned to the OFF position.

#.16..Crank Sense.
#.Cr-[H/L].
#.Cluster and instrument panel crank sense.
#.Displays Cluster and instrument panel Crank sense. (H = Ignition, L = Ground or over-charging).
#.(Crank sense it the Pos I (Accessory) supply to the cluster. If this is missing then the cluster will remain dead for about 20 seconds after key on. Then it will function normally. This can happen when someone fits a radio and blows the accessory fuse).

Note:
Additional tests are available after number #.16 but are not useful for diagnostics.

Note:
Later vehicles had a "cost reduced" cluster that had a different Engineering Test Mode layout. These came in about 03-53 reg, and can be distinguished by only the symbol lighting up in the tell tale rather than the whole lot. (LEDs rather than bulbs).
These clusters used stepper motors for the gauges rather than the air cored ones and did not have a Gauge Sweep test?